Two-component part, and gas turbine

Abstract

The invention relates to a part (1) which has two components (4, 7) inserted one inside the other, a wedge-shaped structure (19) being present in the contact region of the inserted component (4).

Description

[0001] Component consisting of two components and gas turbine

[0002] The invention relates to an improved connection between two components of a component and a gas turbine.

[0003] If a component has two or at least two components that engage or are pushed together, this connection or contact point can lead to damage to at least one of these components during operation of the component due to vibrations between the components.

[0004] An example of this is the so-called "basket" of a gas turbine combustion system, which is connected to a "transition". The "basket" has spring clips at one contact point.

[0005] An example of this is disclosed in WO 2017 / 095358 Al.

[0006] This can lead to increased wear and tear.

[0007] It is therefore an object of the invention to solve the above-mentioned problem.

[0008] The object is achieved by a component according to claim 1 and a gas turbine or combustion system according to claim 7.

[0009] The subclaims list further advantageous measures which can be combined as desired to achieve further advantages.

[0010] It shows

[0011] Figure 1 schematically shows a first and a second component of a component,

[0012] Figure 2 shows a section of a "basket", Figure 3 shows part of an improved connection. The figures and the description represent only exemplary embodiments of the invention.

[0013] Investigations into occasional damage to a spring clip on the "basket" as a first component of a part show that this occurs more frequently when the coated area, i.e. the end of the spring clip, hammers through a layer in the receiving ring of the "transition" - as a second component of the part. If a certain depth is reached in the receiving ring due to hammer wear, the end of a spring clip becomes wedged in the receiving ring and axial displacement is made difficult or impossible. This leads to tensile stress in the spring clip, which can lead to crack initiation and ultimately to damage to the spring clip.

[0014] Figure 1 schematically shows a component 1 consisting of a "basket" 4 as the first component 4 and a "transition" as the second component 7. The "basket" 4 has a specially shaped front side with spring clips 13, wherein the "basket" 4 is pushed into a receiving ring 10 of the "transition" 7.

[0015] Figure 2 shows a section of the “basket” 4, which comes to rest in the “transition” 7 in the receiving ring 10 and establishes a connection and contact.

[0016] One of several spring clips 13 with a coated end 16 can be seen.

[0017] In the prior art, this coating 16 is designed to be flat or of uniform thickness.

[0018] Figure 3 shows an improved design of the spring clip 13 of the "basket" 4 or the first component, which forms a contact area with the "transition" 7 and thus represents an improved connection.

[0019] According to the invention, the end of the spring clip 13 is wedge-shaped or truncated conical. Preferably, a wedge-shaped or truncated conical structure 19 is provided at the end of the spring clip 13.

[0020] The wedge-shaped structure 19 can preferably have a flattening at the top (truncated conical) as shown in Figure 3, but can also be triangular in cross-section.

[0021] The wedge-shaped structure 19 can also be spherical or oval in cross section.

[0022] The slopes of the side surfaces of the wedge-shaped structure 19 or the truncated conical structure 19 can be the same or different (symmetrical, asymmetrical). This depends on the components 4, 7 and their operating conditions.

[0023] The wedge-shaped structure 19 can preferably be formed in one piece or monolithically with the spring clip 13.

[0024] The wedge-shaped structure 19 virtually replaces the coating 16 .

[0025] The wedge-shaped structure 19 is preferably also produced separately, in particular by welding, or it 19 is soldered or welded on as a prefabricated element.

[0026] A wedge-shaped structure 19 is preferably produced by means of material deposition, in particular by LMD (Laser Metal Deposition).

[0027] The production can be carried out by known processes such as welding using welding filler material, with wires or powder being available as additional material.

[0028] The wedge-shaped structure 19 on the first component 4 or on the spring clip 13 prevents wedging of the spring clip 13, since the wedge-shaped structure 19 enables movement in the event of "hammering" as described in the prior art. The wedge-shaped structure 19, with a material that is preferably more wear-resistant than the base material of the receiving ring 10, can further reduce abrasion by the spring clip 13 or the wedge-shaped structure.

[0029] The spring clip 13 preferably comprises a nickel-based alloy.

[0030] The wedge-shaped structure 19 has a different material which is significantly more resistant to erosion.

[0031] Different material means that at least one alloy component is present in greater or lesser quantities or that at least one alloy component has a difference of at least 10%, in particular at least 15%, or that the material of the wedge-shaped structure 19 has a hardness that is at least 10%, in particular at least 20% higher.

[0032] Preferably, a stellite is used as the material for the wedge-shaped structure 19.

[0033] This wedge-shaped design prevents the spring clip 13 from becoming wedged in the receiving ring 10 in the contact area of ​​the "transition" 7 and extends the service life and thus the service interval of the "baskets" 4.

Claims

Patent claims 1. Component (1) comprising two components (4, 7) pushed into one another, which have a contact area between one another, wherein the inserted component (4) is wedge-shaped or truncated conical (19) in the contact area, in particular a wedge-shaped or truncated conical structure (19) is present.

2. Component according to claim 1, wherein the first component (4) has a spring clip (13), wherein one end of the spring clip (13) is wedge-shaped or truncated conical, in particular the end has a wedge-shaped structure (19).

3. Component according to claim 1 or 2, wherein rises of the side surfaces of the wedge-shaped or truncated conical end of the spring clip (13) or of the structure (19) are equal (symmetrical).

4. Component according to claim 1 or 2, wherein rises of the side surfaces of the wedge-shaped or truncated conical end of the spring clip (13) or of the structure (19) are different (asymmetric).

5. Component according to one or more of claims 1, 2, 3 or 4, wherein the wedge-shaped end (19) or the wedge-shaped structure (19) comprises a different material than the remaining part of the inserted component (4), in particular of the spring clip (13), wherein the remaining part of the inserted component (4) a nickel-based alloy, wherein the material of the wedge-shaped end (19) or the wedge-shaped structure (19) is at least 10%, in particular at least 20%, harder.

6. Component according to one or more of claims 1, 2, 3, 4 or 5, wherein at least the wedge-shaped end (19) of the wedge-shaped structure (19) has a stellite as material.

7. Gas turbine or combustion system comprising a component (1) according to one or more of claims 1, 2, 3, 4, 5 or 6.

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